This dog backpack will give your dog maximum comfort and convenience when hiking with you. Designed with a removable pack, so you can easily take the weight off his or her back during rest stops. Made with extra-strong nylon for durability, dog backpack has large storage pockets for food, water and other gear. Bonus feature: the Quick Release Leash Holder for use when approaching other hikers, dogs, wildlife or park rangers. Available in 2 sizes: Medium for dogs 18-50 lbs with girth 26-32 inches and Large for dogs 50-79 lbs with girth 30-40 inches.